Oil cylinder capable of adaptively switching supporting modes based on hydraulic control

Abstract

The invention aims to provide an oil cylinder capable of adaptively switching supporting modes based on hydraulic control, which belongs to the technical field of mechanical manufacturing and comprises a hollow cylinder body, a second piston rod sleeved in the cylinder body, a first piston rod sleeved in the second piston rod, an end cover arranged at the bottom of the cylinder body, and a supporting disc arranged at the bottom of the second piston rod. One end of the first piston rod penetrates through the supporting disc and is connected with a supporting wheel, the end, located in the cylinder body, of the second piston rod is connected with a second piston, the end, located in the second piston rod, of the first piston rod is connected with a first piston, a first spring is arranged in the second piston rod, one end of the first spring is fixedly connected with the second piston, and the other end of the first spring is fixedly connected with the first piston. A second spring is arranged at the top end of the inner side of the cylinder body, the top end of the second spring is fixedly connected with the cylinder body, a first oil inlet and a second oil inlet are formed in the upper end and the lower end of one side of the cylinder body, and a third oil inlet is formed in the upper end of one side of the second piston rod. Through control of spring force and hydraulic force, one oil cylinder can achieve automatic switching between a moving mode and a fixed supporting mode.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical manufacturing, and in particular relates to an oil cylinder capable of adaptively switching support modes based on hydraulic control. Background Art

[0002] The coal tunnels in underground coal mines that use H-type belt racks to transport coal or coal gangue have the characteristics of small space, difficult management of production auxiliary materials, and high labor intensity of workers. In order to reduce the labor intensity of workers and centrally manage production auxiliary materials, a portable crane riding on an H-type belt rack for coal tunnels is designed based on the small space characteristics of coal tunnels. The fixed support and flexible movement of the bottom plate of the crane are achieved by manually replacing the support cylinder, which has a large workload and low work efficiency. Summary of the invention

[0003] The purpose of the present invention is to provide a cylinder that can adaptively switch support modes based on hydraulic control. By using spring force and hydraulic control, one cylinder can automatically switch between two modes, so that a portable crane riding on an H-type belt frame in a coal tunnel can automatically switch between mobile and fixed support modes at any time. The present invention is combined with a portable crane riding on an H-type belt frame to avoid manual replacement of support cylinder modes and improve work efficiency.

[0004] The present invention adopts the following technical solution: A hydraulic cylinder with adaptive switchable support modes based on hydraulic control comprises a hollow cylinder body, a hollow piston rod 2 is sleeved in the cylinder body, a piston rod 1 is sleeved in the piston rod 2, an end cover is provided at the bottom of the cylinder body, a support plate is provided at the bottom of the piston rod 2, one end of the piston rod 1 passes through the support plate and is connected to a support wheel, one end of the piston rod 2 located in the cylinder body is connected to piston 2, one end of the piston rod 1 located in the piston rod 2 is connected to piston 1, a spring 1 is provided in the piston rod 2, one end of the spring 1 is fixedly connected to piston 2, and the other end is fixedly connected to piston 1, a spring 2 is provided at the inner top end of the cylinder body, the top end of the spring 2 is fixedly connected to the cylinder body, an upper end and a lower end of one side of the cylinder body are respectively provided with an oil channel 1 and an oil channel 2, and an upper end of one side of the piston rod 2 is provided with an oil channel 3.

[0005] Furthermore, the axes of the cylinder body, piston rod one and piston rod two are located on the same straight line.

[0006] Furthermore, the outer diameter of the piston one matches the inner diameter of the piston rod two.

[0007] Furthermore, the outer diameter of the second piston matches the inner diameter of the cylinder.

[0008] Furthermore, a sealing ring 1 is provided on the end cover.

[0009] Furthermore, a sealing ring 2 is provided on the piston 1.

[0010] Furthermore, a sealing ring three is provided on the piston two.

[0011] Furthermore, a groove is provided in the support plate.

[0012] The beneficial effects of the present invention are as follows: 1. The present invention controls spring force and hydraulic force, and one oil cylinder can realize automatic switching between mobile and fixed support modes.

[0013] 2. The present invention is combined with a portable crane riding on an H-shaped belt frame to avoid manual replacement of the supporting cylinder mode and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the connection of the support wheels of the present invention; Figure 3 This is a schematic diagram of the ground operation of the support plate of the present invention; Figure 4 This is a schematic diagram of the ground operation principle of the support wheels of the present invention; Among them: 1-support wheel; 2-piston rod one; 3-support plate; 4-piston rod two; 5-sealing ring one; 6-end cover; 7-cylinder body; 8-piston one; 9-sealing ring two; 10-spring one; 11-sealing ring three; 12-piston two; 13-spring two; 14-oil channel one; 15-oil channel two; 16-oil channel three. DETAILED DESCRIPTION

[0015] The present invention will be further described with reference to the accompanying drawings.

[0016] The present invention discloses an oil cylinder capable of adaptively switching support modes based on hydraulic control, comprising a support wheel 1, a piston rod 2, a support plate 3, a piston rod 4, a sealing ring 5, an end cover 6, a cylinder body 7, a piston 8, a sealing ring 9, a spring 10, a sealing ring 3 11, a piston 2 12, and a spring 2 13.

[0017] The upper end of the piston rod 2 is fixedly installed with the piston 8; the support plate 3 is fixedly installed with the lower end of the piston rod 4; the piston rod 4 is coaxially installed with the cylinder body 7, and together with the sealing ring 5 and the end cover 6, forms a sealing cavity 1; the piston 8, the piston rod 4 and the sealing ring 9 form a sealing cavity 2; the upper end of the spring 10 is fixedly connected with the lower end of the piston 2 12, and the lower end of the spring 10 is fixedly connected with the upper end of the piston 8, and is in a stretched state under normal conditions; the piston 2 12, the cylinder body 7 and the sealing ring 3 11 form a sealing cavity 3; the upper end of the spring 2 13 is fixedly connected with the cylinder body 7, and is in a non-retracted state under normal conditions; after the support wheel 1 is assembled with the lower end of the piston rod 2, the support wheel 1 can rotate freely around the center axis, and the rotation is flexible. The outer surface of the piston rod 24 can be used as the piston rod of the cylinder body 7, and the inner surface of the piston rod 24 can be used as the cavity of the piston 18; the outer diameter of the piston 18 is coaxial with the inner diameter of the piston rod 24, and the sealing ring 29 is required to have a good sealing effect to ensure that the sealing cavity 2 has a good sealing effect; the outer diameter of the piston 212 is coaxial with the inner diameter of the cylinder body 7, and the sealing ring 31 is required to have a good sealing effect to ensure that the sealing cavity 3 has a good sealing effect; the inner diameter of the end cover 6 is coaxial with the outer diameter of the piston rod 24, and the sealing ring 15 is required to have a good sealing effect to ensure that the sealing cavity 1 has a good sealing effect; a groove is provided inside the support plate 3 to ensure that the support wheel 1 can be completely placed in the groove inside the support plate 3 when it is retracted; the upper and lower ends of the cylinder body 7 are respectively provided with an oil passage 14 and an oil passage 2 15; the upper end of the piston rod 24 is provided with an oil passage 3 16; the oil passage 3 16 can be provided with a plurality of small-diameter oil passages around the piston rod 24 without affecting the stroke of the piston 18.

[0018] Combination Figure 3 When the support plate 3 is used to support the ground, the oil channel 14 enters the pressure oil, the piston 2 12 moves downward, the spring 2 13 is in a free state, the oil channel 2 15 and the oil channel 3 16 are in a back pressure state or a leading pressure state, the spring 10 contracts and is in a free state, the piston 18 moves upward, and the support wheel 1 returns to the Figure 2 The support plate 3 shown has an internal groove, so that the lower surface of the support plate 3 supports the ground.

[0019] Combination Figure 4When the support wheel 1 is used to support the ground, the oil cylinder of the present invention that can adaptively switch the support mode based on hydraulic control enters the pressure oil in the oil passage 2 15 and the oil passage 3 16, and the piston 2 12 moves upward and slowly compresses the spring 2 13. When the force exerted by the compressed spring 2 13 on the upper surface of the piston 2 12 is equal to the hydraulic pressure on the lower surface of the piston 2 12, the piston 1 8 moves downward, and the support wheel 1 moves downward under the drive of the piston rod 1 2 and extends from the lower surface of the support plate 3. At the same time, the spring 10 is stretched. When the tension of the spring 10 on the upper surface of the piston 1 8 is equal to the hydraulic pressure on the upper surface of the piston 1 8 and the support force of the ground on the support wheel 1, the support wheel 1 supports the ground. At the same time, the support wheel 1 can rotate under the tension state.

Claims

1. A hydraulic cylinder capable of adaptively switching support modes based on hydraulic control, characterized in that: The invention comprises a hollow cylinder body (7), wherein a hollow piston rod (4) is sleeved in the cylinder body (7), a piston rod (2) is sleeved in the piston rod (4), an end cover (6) is provided at the bottom of the cylinder body (7), a support plate (3) is provided at the bottom of the piston rod (4), one end of the piston rod (2) passes through the support plate (3) and is connected to a support wheel (1), one end of the piston rod (4) located in the cylinder body (7) is connected to a piston rod (12), and one end of the piston rod (2) located in the piston rod (4) is connected to a piston rod (12). A piston (8) is connected, a spring (10) is arranged inside the piston rod (4), one end of the spring (10) is fixedly connected to the piston (12), and the other end is fixedly connected to the piston (8), a spring (13) is arranged at the top end of the inner side of the cylinder body (7), and the top end of the spring (13) is fixedly connected to the cylinder body (7), an oil passage (14) and an oil passage (15) are arranged at the upper end and the lower end of one side of the cylinder body (7), respectively, and an oil passage (3) (16) is arranged at the upper end of one side of the piston rod (4).

2. The hydraulic cylinder capable of adaptively switching support modes based on hydraulic control according to claim 1, characterized in that: The axes of the cylinder body (7), the first piston rod (2) and the second piston rod (4) are located on the same straight line.

3. The hydraulic cylinder capable of adaptively switching support modes based on hydraulic control according to claim 1, characterized in that: The outer diameter of the piston one (8) matches the inner diameter of the piston rod two (4).

4. The hydraulic cylinder capable of adaptively switching support modes based on hydraulic control according to claim 1, characterized in that: The outer diameter of the second piston (12) matches the inner diameter of the cylinder body (7).

5. The hydraulic cylinder capable of adaptively switching support modes based on hydraulic control according to claim 1, characterized in that: The end cover (6) is provided with a sealing ring 1 (5).

6. The hydraulic cylinder capable of adaptively switching support modes based on hydraulic control according to claim 1, characterized in that: The piston 1 (8) is provided with a sealing ring 2 (9).

7. The hydraulic cylinder capable of adaptively switching support modes based on hydraulic control according to claim 1, characterized in that: The second piston (12) is provided with a sealing ring (11).

8. The hydraulically controlled oil cylinder capable of adaptively switching support modes according to claim 1, characterized in that: The support plate (3) is provided with a groove therein.

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